Upright bass violin



FIG. 1 is a front right perspective view of the bass violin.

FIG. 2 is a front view of the bass violin.

FIG. 3 is a rear view of the bass violin.

FIG. 4 is a right side view of the bass. The left side is a mirror image.

FIG. 5 is a top view of the bass violin; and,

FIG. 6 is a bottom view of the bass violin. 

The ornamental design for a upright bass violin, as shown as described. 